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Use the periodic table to answer the following question. Identify an element that would tend to gain two electrons.

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प्रश्न

Use the periodic table to answer the following question.

Identify an element that would tend to gain two electrons.

टीपा लिहा
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उत्तर १

An element is likely to gain two electrons if it needs only two electrons to attain the stable noble gas configuration. Thus, the general electronic configuration of such an element should be ns2 np4. This is the electronic configuration of the oxygen family.

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उत्तर २

Element belonging to oxygen family (group 16) e.g., oxygen.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 3: Classification of Elements and Periodicity in Properties - EXERCISES [पृष्ठ ९७]

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एनसीईआरटी Chemistry - Part 1 and 2 [English] Class 11
पाठ 3 Classification of Elements and Periodicity in Properties
EXERCISES | Q 3.27 - (c) | पृष्ठ ९७

संबंधित प्रश्‍न

Write the atomic number of the element present in the third period and a seventeenth group of the periodic table.


Use the periodic table to answer the following question.

Identify the group having metal, non-metal, liquid as well as gas at room temperature.


Write the outer electronic configuration of the following using the orbital notation method. Justify.

Cu (belongs to period 4 and group 11)


Answer the following.

La belongs to group 3 while Hg belongs to group 12 and both belong to period 6 of the periodic table. Write down the general outer electronic configuration of the ten elements from La to Hg together using the orbital notation method.


Answer the following question.

The electronic configuration of some element is given below:

1s2

In which group and period of the periodic table the element is placed?


Answer the following question.

For s-block and p-block elements show that the number of valence electrons is equal to its group number.


Consider the oxides Li2O, CO2, B2O3.

Which oxide would you expect to be the most basic?


Consider the oxides Li2O, CO2, B2O3.

Give the formula of an amphoteric oxide.


In the modern periodic table, elements are arranged in order of increasing atomic numbers which is related to the electronic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, s, p, d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. In accordance with the Arfbau principle, the seven periods have 2, 8, 8, 18, 18, 32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids are placed at the bottom of the main body of the periodic table.

The electronic configuration of the element which is just above the element with atomic number 43 in the same group is ______.


Which of the following sets contain only isoelectronic ions?

(i) \[\ce{Zn^{2+}, Ca^{2+}, Ga^{3+}, Al^{3+}}\]

(ii) \[\ce{K+ , Ca^{2+}, Sc^{3+}, Cl-}\]

(iii) \[\ce{P^{3-}, S^{2-}, Cl- , K+}\]

(iv) \[\ce{Ti^{4+}, Ar, Cr^{3+}, V^{5+}}\]


An element belongs to 3rd period and group-13 of the periodic table. Which of the following properties will be shown by the element?

(i) Good conductor of electricity

(ii) Liquid, metallic

(iii) Solid, metallic

(iv) Solid, non metallic


Identify the group and valency of the element having atomic number 119. Also predict the outermost electronic configuration and write the general formula of its oxide.


How does the metallic and non-metallic character vary on moving from left to right in a period?


Write down the outermost electronic configuration of alkali metals. How will you justify their placement in group 1 of the periodic table?


The electronic configuration of Pt (atomic number 78) is ______.


E.N. of Si is ______. (Covalent radius of Si = 1.175 Å)


The IUPAC nomenclature of an element with electronic configuration [Rn] 5f146d17s2 is ______.


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